DESIGN OF CUSTOMER DATA MANAGEMENT INFORMATION SYSTEM FOR CNOP AND OLO USING THE WATERFALL MODEL (Case Study: PT. Telkom). Jurnal Riset Teknik Informatika, [S. l.], v. 2, n. 2, p. 1–8, 2026. Disponível em: https://ejournal.jurnalist.org/index.php/jureti/article/view/100.. Acesso em: 17 jun. 2026.